Train control



Dec. 9, 1924- v H. JACKSON TRAIN CONTROL Filed Oct. 13. 1922 5 Sheets-Sheet 1- ATTORNEY WITNESS:

Dec. 9, 1924. 1,518,657

1 H. JACKSON v V TRAIN CONTROL Filed-Oct. 13 ,922 3 Sheets-Sheet 2 Q Q J j g/ww I\ \E I Egg NW N L f; 6 EF L g F 0 E O C. :14 H

4 OJ L LIU A'ITORNEY WITNESS:

Dec. 9, 1924. 1,518,657

H. JACKSON TRAIN CONTROL Filed Oct. 13. 1922 3 Sheets-Sheet 3 I i l I A} k a L/q/g /6 i 4 I g. g I a I Howard Jae r5 MENTOR $17M 7? ii I NEY WITNESS:

Patented Dec. 9, 1924.

UNITED STATES HOWARD JACKSON, 0F OMAHA, NEBRASKA.

TRAIN COIfTTROL.

Application filed. October 13, 1922. Serial No. 594,300.

To all whom it may concern:

Be it known that I, HOWARD JAoKsoN, a citizen of the United States, residing at Omaha, in the county of Douglas and State of Nebraska, have invented new and useful Improvements in Train Controls, of which the following is aspecification.

This invention relates to improvements in automatic train stops, the general object of the invention being to provide a spring actuated member for closing the master valve of the engine with electrically operated means for normally holding the member in a position with the valve open, with means for supplying current to said means when a train reaches a block already occupied by a train.

Another object of the invention is to provide means whereby the parts can be reset, after being operated, by hand.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is a diagrammatic view showing the arrangement of parts on an engine.

Figure 2 is a plan view of the valve operating mechanism.

Figure 3 is a section on line 3-3 of Figure 2.

Figure 4: is a section on line 44 of Figure 2.

Figure 5 is a diagrammatic view of the wiring on the engine.

Figure 6 is a plan view of a portion of a track.

Figure 7 is a diagrammatic view of the entire invention.

In these views 1 indicates the master valve of the engine and 2 indicates a yoke which is bolted to the casing of said valve. This yoke guides the actuating rod 3 of the valve, said rod passing through a hole in the yoke and having a handle or knob 4. at its outer end. A spring 5 surrounds the rod and has one end bearing against a part of the yoke and the other against a projection 6 on the rod. This spring'tends to hold the parts with the valve closed. A frame 7 is connected with the yoke andthis frame carries a solenoid 8, the core 9 of which is made in the form of a pin which extends through ahole 1O transversely arranged in the end provided with a knob 12 at its outer end and it has a part thereof cut away to form a recess 13. The pin is prevented from rotary movement in the solenoid by having a square part 14 engaging the square socket in the solenoid.

From the above it will be seen that when the rod 3 is pulled outwardly to place its recess 11 in alignment with the hole 10 and the pin 9 is in projecting position so that its uncut part will engage the recess 11, the rod 3 is held in this position by the pin and cannot be moved by its spring. When the solenoid is energized the pin 9 will be pulled inwardly and the recess 13 will then come in line with the recess 11, thus freeing the rod 3 and permitting its spring 5 to move inwardly and thus close the valve. When the parts are to be reset the rod 3 is pulled out by means of its handle 4 and then the pin 9 is pulled out by means of its handle 12 to lock the parts together and to hold the rod 3 against inward movement by its spring.

The engine carries a member 14- for sup porting a roller 15. This member 14 is insulated from the rest of the engine and is electrically connected with a battery 16 on the engine. Ilhis battery is also connected with the solenoid by the conductor 17 and the solenoid is grounded on the frame of the engine by the conductor 18.

The track A is divided into blocks by insulating portions of the track in the usual manner. Adjacent the end of each block a contact plate 19 is arranged so as to be engaged by the roller 15 on a train which is about to leave the block. This plate 19 is connected by the conductor 20 with the next block, indicated in the drawing at B, and the opposite rail of said block B is connected by the conductor 21 with the rail of the first mentioned block. Thus when a train is on block B and a train is approaching said block B as soon as this last mentioned train has its roller 50 engaging block 19 the circuit to the solenoid will be completed through the said roller 15, plate 19., conductor 20, one rail of block B, through wheels and axles of the train on said block B to the other rail through conductor 21 to the first. block andthrough the train 'on said first block to the solenoid and battery. Thus the solenoid on'the approaching train will be energized which will move the pin to release the rod 3 and thus permit the spring to close the valve and stop the train.

It is thought from the foregoing description that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrai-ige-ment of the several parts, provided that such changes fall within the scope of the appended claim.

one end of the yoke and at right angles to V the rod, a solenoid for moving the locking pin to releasing position, a battery connected with the solenoid, the solenoid being grounded on the engine frame, an insulated contact member carried by the engine and connected with the battery, a plate located on the track for engaging said contact memher, a conductor connecting the plate with one rail of the track and a conductor connectingthe other rail of the track with a rail in the next block.

In testimony whereof I afiix my signature. q r

HOWARD JACKSON. 

